大约有 47,000 项符合查询结果(耗时:0.0550秒) [XML]
You have already activated rake 0.9.0, but your Gemfile requires rake 0.8.7
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edited Jul 12 '12 at 21:24
jackr
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How to match all occurrences of a regex
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edited May 18 '12 at 6:23
Andrew Marshall
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Getting the first character of a string with $str[0]
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edited Aug 8 '17 at 4:14
Alexis Wilke
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Java synchronized static methods: lock on object or class
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129
Since a static method has no associated object, will the synchronized keyword lock on the ...
Display numbers with ordinal suffix in PHP
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15 Answers
15
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How to delete multiple values from a vector?
I have a vector like: a = c(1:10) and I need to remove multiple values, like: 2, 3, 5
8 Answers
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Cast Object to Generic Type for returning
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212
You have to use a Class instance because of the generic type erasure during compilation.
publi...
Find XOR of all numbers in a given range
...u are given a large range [a,b] where 'a' and 'b' can be typically between 1 and 4,000,000,000 inclusive. You have to find out the XOR of all the numbers in the given range.
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Extract elements of list at odd positions
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Solution
Yes, you can:
l = L[1::2]
And this is all. The result will contain the elements placed on the following positions (0-based, so first element is at position 0, second at 1 etc.):
1, 3, 5
so the result (actual numbers) will be:
2, 4, 6
Exp...
How to access array elements in a Django template?
... access individual elements of the array in the array (e.g. arr[0] , arr[1] ) etc. instead of looping through the whole array.
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